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    Question

    A bag contains 5 red balls, 4 black balls and 8 white

    balls. Two balls are drawn simultaneously. Find the probability that both the balls are of same colour.
    A 5/17 Correct Answer Incorrect Answer
    B 11/34 Correct Answer Incorrect Answer
    C 13/34 Correct Answer Incorrect Answer
    D 7/17 Correct Answer Incorrect Answer

    Solution

    Total number of balls in the bag = 5 + 4 + 8 = 17 Total possible outcomes = 17C2 = 136 Number of favourable outcomes = 5C2 + 4C2 + 8C2 = 10 + 6 + 28 = 44 Required probability = 44/136 = 11/34

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